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<a name="gtk3-Feature-Test-Macros"></a><div class="titlepage"></div>
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<td valign="top">
<h2><span class="refentrytitle"><a name="gtk3-Feature-Test-Macros.top_of_page"></a>Version Information</span></h2>
<p>Version Information — Variables and functions to check the GTK+ version</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_proto_type">
<col class="functions_proto_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">guint</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-major-version" title="gtk_get_major_version ()">gtk_get_major_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">guint</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-minor-version" title="gtk_get_minor_version ()">gtk_get_minor_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">guint</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-micro-version" title="gtk_get_micro_version ()">gtk_get_micro_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">guint</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-binary-age" title="gtk_get_binary_age ()">gtk_get_binary_age</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">guint</span>
</td>
<td class="function_name">
<a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-interface-age" title="gtk_get_interface_age ()">gtk_get_interface_age</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">gchar</span> *
</td>
<td class="function_name">
<a class="link" href="gtk3-Feature-Test-Macros.html#gtk-check-version" title="gtk_check_version ()">gtk_check_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-CHECK-VERSION:CAPS" title="GTK_CHECK_VERSION()">GTK_CHECK_VERSION</a><span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="other_proto_type">
<col class="other_proto_name">
</colgroup>
<tbody>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#gtk-major-version" title="gtk_major_version">gtk_major_version</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#gtk-minor-version" title="gtk_minor_version">gtk_minor_version</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#gtk-micro-version" title="gtk_micro_version">gtk_micro_version</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#gtk-binary-age" title="gtk_binary_age">gtk_binary_age</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#gtk-interface-age" title="gtk_interface_age">gtk_interface_age</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MAJOR-VERSION:CAPS" title="GTK_MAJOR_VERSION">GTK_MAJOR_VERSION</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MINOR-VERSION:CAPS" title="GTK_MINOR_VERSION">GTK_MINOR_VERSION</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MICRO-VERSION:CAPS" title="GTK_MICRO_VERSION">GTK_MICRO_VERSION</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#GTK-BINARY-AGE:CAPS" title="GTK_BINARY_AGE">GTK_BINARY_AGE</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gtk3-Feature-Test-Macros.html#GTK-INTERFACE-AGE:CAPS" title="GTK_INTERFACE_AGE">GTK_INTERFACE_AGE</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gtk/gtk.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.description"></a><h2>Description</h2>
<p>GTK+ provides version information, primarily useful in configure checks
for builds that have a configure script. Applications will not typically
use the features described here.</p>
</div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gtk-get-major-version"></a><h3>gtk_get_major_version ()</h3>
<pre class="programlisting"><span class="returnvalue">guint</span>
gtk_get_major_version (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns the major version number of the GTK+ library.
(e.g. in GTK+ version 3.1.5 this is 3.)</p>
<p>This function is in the library, so it represents the GTK+ library
your code is running against. Contrast with the <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MAJOR-VERSION:CAPS" title="GTK_MAJOR_VERSION"><span class="type">GTK_MAJOR_VERSION</span></a>
macro, which represents the major version of the GTK+ headers you
have included when compiling your code.</p>
<div class="refsect3">
<a name="gtk-get-major-version.returns"></a><h4>Returns</h4>
<p> the major version number of the GTK+ library</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-0.html#api-index-3.0">3.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-minor-version"></a><h3>gtk_get_minor_version ()</h3>
<pre class="programlisting"><span class="returnvalue">guint</span>
gtk_get_minor_version (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns the minor version number of the GTK+ library.
(e.g. in GTK+ version 3.1.5 this is 1.)</p>
<p>This function is in the library, so it represents the GTK+ library
your code is are running against. Contrast with the
<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MINOR-VERSION:CAPS" title="GTK_MINOR_VERSION"><span class="type">GTK_MINOR_VERSION</span></a> macro, which represents the minor version of the
GTK+ headers you have included when compiling your code.</p>
<div class="refsect3">
<a name="gtk-get-minor-version.returns"></a><h4>Returns</h4>
<p> the minor version number of the GTK+ library</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-0.html#api-index-3.0">3.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-micro-version"></a><h3>gtk_get_micro_version ()</h3>
<pre class="programlisting"><span class="returnvalue">guint</span>
gtk_get_micro_version (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns the micro version number of the GTK+ library.
(e.g. in GTK+ version 3.1.5 this is 5.)</p>
<p>This function is in the library, so it represents the GTK+ library
your code is are running against. Contrast with the
<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MICRO-VERSION:CAPS" title="GTK_MICRO_VERSION"><span class="type">GTK_MICRO_VERSION</span></a> macro, which represents the micro version of the
GTK+ headers you have included when compiling your code.</p>
<div class="refsect3">
<a name="gtk-get-micro-version.returns"></a><h4>Returns</h4>
<p> the micro version number of the GTK+ library</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-0.html#api-index-3.0">3.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-binary-age"></a><h3>gtk_get_binary_age ()</h3>
<pre class="programlisting"><span class="returnvalue">guint</span>
gtk_get_binary_age (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns the binary age as passed to <code class="literal">libtool</code>
when building the GTK+ library the process is running against.
If <code class="literal">libtool</code> means nothing to you, don't
worry about it.</p>
<div class="refsect3">
<a name="gtk-get-binary-age.returns"></a><h4>Returns</h4>
<p> the binary age of the GTK+ library</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-0.html#api-index-3.0">3.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-interface-age"></a><h3>gtk_get_interface_age ()</h3>
<pre class="programlisting"><span class="returnvalue">guint</span>
gtk_get_interface_age (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Returns the interface age as passed to <code class="literal">libtool</code>
when building the GTK+ library the process is running against.
If <code class="literal">libtool</code> means nothing to you, don't
worry about it.</p>
<div class="refsect3">
<a name="gtk-get-interface-age.returns"></a><h4>Returns</h4>
<p> the interface age of the GTK+ library</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-0.html#api-index-3.0">3.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-check-version"></a><h3>gtk_check_version ()</h3>
<pre class="programlisting">const <span class="returnvalue">gchar</span> *
gtk_check_version (<em class="parameter"><code><span class="type">guint</span> required_major</code></em>,
                   <em class="parameter"><code><span class="type">guint</span> required_minor</code></em>,
                   <em class="parameter"><code><span class="type">guint</span> required_micro</code></em>);</pre>
<p>Checks that the GTK+ library in use is compatible with the
given version. Generally you would pass in the constants
<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MAJOR-VERSION:CAPS" title="GTK_MAJOR_VERSION"><span class="type">GTK_MAJOR_VERSION</span></a>, <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MINOR-VERSION:CAPS" title="GTK_MINOR_VERSION"><span class="type">GTK_MINOR_VERSION</span></a>, <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MICRO-VERSION:CAPS" title="GTK_MICRO_VERSION"><span class="type">GTK_MICRO_VERSION</span></a>
as the three arguments to this function; that produces
a check that the library in use is compatible with
the version of GTK+ the application or module was compiled
against.</p>
<p>Compatibility is defined by two things: first the version
of the running library is newer than the version
<em class="parameter"><code>required_major.required_minor</code></em>
.<em class="parameter"><code>required_micro</code></em>
. Second
the running library must be binary compatible with the
version <em class="parameter"><code>required_major.required_minor</code></em>
.<em class="parameter"><code>required_micro</code></em>

(same major version.)</p>
<p>This function is primarily for GTK+ modules; the module
can call this function to check that it wasn’t loaded
into an incompatible version of GTK+. However, such a
check isn’t completely reliable, since the module may be
linked against an old version of GTK+ and calling the
old version of <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-check-version" title="gtk_check_version ()"><code class="function">gtk_check_version()</code></a>, but still get loaded
into an application using a newer version of GTK+.</p>
<div class="refsect3">
<a name="gtk-check-version.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>required_major</p></td>
<td class="parameter_description"><p>the required major version</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>required_minor</p></td>
<td class="parameter_description"><p>the required minor version</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>required_micro</p></td>
<td class="parameter_description"><p>the required micro version</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-check-version.returns"></a><h4>Returns</h4>
<p><code class="literal">NULL</code> if the GTK+ library is compatible with the
given version, or a string describing the version mismatch.
The returned string is owned by GTK+ and should not be modified
or freed. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GTK-CHECK-VERSION:CAPS"></a><h3>GTK_CHECK_VERSION()</h3>
<pre class="programlisting">#define             GTK_CHECK_VERSION(major,minor,micro)</pre>
<p>Returns <code class="literal">TRUE</code> if the version of the GTK+ header files
is the same as or newer than the passed-in version.</p>
<div class="refsect3">
<a name="GTK-CHECK-VERSION.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>major</p></td>
<td class="parameter_description"><p>major version (e.g. 1 for version 1.2.5)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>minor</p></td>
<td class="parameter_description"><p>minor version (e.g. 2 for version 1.2.5)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>micro</p></td>
<td class="parameter_description"><p>micro version (e.g. 5 for version 1.2.5)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GTK-CHECK-VERSION.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if GTK+ headers are new enough</p>
</div>
</div>
</div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="gtk-major-version"></a><h3>gtk_major_version</h3>
<pre class="programlisting">#define gtk_major_version gtk_get_major_version ()
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gtk-minor-version"></a><h3>gtk_minor_version</h3>
<pre class="programlisting">#define gtk_minor_version gtk_get_minor_version ()
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gtk-micro-version"></a><h3>gtk_micro_version</h3>
<pre class="programlisting">#define gtk_micro_version gtk_get_micro_version ()
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gtk-binary-age"></a><h3>gtk_binary_age</h3>
<pre class="programlisting">#define gtk_binary_age gtk_get_binary_age ()
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gtk-interface-age"></a><h3>gtk_interface_age</h3>
<pre class="programlisting">#define gtk_interface_age gtk_get_interface_age ()
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GTK-MAJOR-VERSION:CAPS"></a><h3>GTK_MAJOR_VERSION</h3>
<pre class="programlisting">#define GTK_MAJOR_VERSION (3)
</pre>
<p>Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-major-version" title="gtk_get_major_version ()"><code class="function">gtk_get_major_version()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-MINOR-VERSION:CAPS"></a><h3>GTK_MINOR_VERSION</h3>
<pre class="programlisting">#define GTK_MINOR_VERSION (24)
</pre>
<p>Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-minor-version" title="gtk_get_minor_version ()"><code class="function">gtk_get_minor_version()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-MICRO-VERSION:CAPS"></a><h3>GTK_MICRO_VERSION</h3>
<pre class="programlisting">#define GTK_MICRO_VERSION (30)
</pre>
<p>Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-micro-version" title="gtk_get_micro_version ()"><code class="function">gtk_get_micro_version()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-BINARY-AGE:CAPS"></a><h3>GTK_BINARY_AGE</h3>
<pre class="programlisting">#define GTK_BINARY_AGE    (2430)
</pre>
<p>Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-binary-age" title="gtk_get_binary_age ()"><code class="function">gtk_get_binary_age()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-INTERFACE-AGE:CAPS"></a><h3>GTK_INTERFACE_AGE</h3>
<pre class="programlisting">#define GTK_INTERFACE_AGE (26)
</pre>
<p>Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-interface-age" title="gtk_get_interface_age ()"><code class="function">gtk_get_interface_age()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.</p>
</div>
</div>
</div>
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